Plant phenotype and interspecific competition between insects determine sawfly performance and density

S. Mopper, Thomas G Whitham, P. W. Price

Research output: Contribution to journalArticle

30 Scopus citations


Tested the effects of pinyon pine Pinus edulis phenotype and competitive interactions on the colonization success, mortality fecundity, and sex ratios of a foliage-feeding sawfly, Neodiprion edulicolis. Sawfly survival was significantly higher on susceptible trees than on resistant trees, but fecundity was significantly lower on susceptible trees. Interactions with a stem moth, Dioryctria albovitella, caused significantly reduced sawfly fecundity on susceptible trees. Sawfly mortality, rather than sawfly fecundity, was the dominant factor influencing population growth rates. -from Authors

Original languageEnglish (US)
Pages (from-to)2135-2144
Number of pages10
Issue number6
StatePublished - 1990


ASJC Scopus subject areas

  • Ecology

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